Usa la fuerza Luke;)
Demostración de SqlFiddle
SELECT UPPER(TO_CHAR(TO_DATE(500,'J'),'Jsp')) || '/=' AS new_value
FROM dual;
La pista es Date en formato escrito.
EDITAR:
Agregando soporte para negative numbers :
Demostración de SqlFiddle
WITH cte AS
(
SELECT 10 AS num FROM dual
UNION ALL SELECT -500 FROM dual
UNION ALL SELECT 0 FROM dual
)
SELECT num AS old_value,
decode( sign( num ), -1, 'NEGATIVE ', 0, 'ZERO', NULL ) ||
decode( sign( abs(num) ), +1, to_char( to_date( abs(num),'J'),'JSP') ) || '/=' AS new_value
FROM cte
EDICIÓN 2:##
Agregando soporte limitado para float:
SqlFiddleDemo3
WITH cte AS
(
SELECT 10 AS num FROM dual
UNION ALL SELECT -500 FROM dual
UNION ALL SELECT 0 FROM dual
UNION ALL SELECT 10.3 FROM dual
UNION ALL SELECT -10.7 FROM dual
)
SELECT
num AS old_value,
decode( sign( num ), -1, 'NEGATIVE ', 0, 'ZERO', NULL )
|| decode( sign( abs(num) ), +1, to_char( to_date( abs(TRUNC(num)),'J'),'JSP') )
||
CASE
WHEN INSTR (num, '.') > 0
THEN ' POINT ' || TO_CHAR (TO_DATE (TO_NUMBER (SUBSTR(num, INSTR (num, '.') + 1)),'J'),'JSP')
ELSE NULL
END AS new_value
FROM cte
EDICIÓN 3:
para 10.3 la salida es DIEZ COMA TRES pero debería ser DIEZ COMA TREINTA para 10.3 y DIEZ COMA TRES para 10.03. ¿Cómo podría lograr esto?
Dependiendo de cuántos dígitos desee para la identidad, podría ser RPADed con 0:
WITH cte AS
(
SELECT 10.03 AS num FROM dual
UNION ALL
SELECT 10.30 FROM dual
UNION ALL
SELECT 10.33 FROM dual
)
SELECT
num AS old_value,
decode( sign( num ), -1, 'NEGATIVE ', 0, 'ZERO', NULL )
|| decode( sign( abs(num) ), +1, to_char( to_date( abs(TRUNC(num)),'J'),'JSP') )
||
CASE
WHEN INSTR (num, '.') > 0
THEN ' POINT ' || TO_CHAR (TO_DATE (TO_NUMBER (RPAD(SUBSTR(num, INSTR (num, '.') + 1)
,2,'0')
),'J'),'JSP')
ELSE NULL
END AS new_value
FROM cte;
db<>demostración de violín
Salida:
+-------------+------------------------+
| OLD_VALUE | NEW_VALUE |
+-------------+------------------------+
| 10.03 | TEN POINT THREE |
| 10.3 | TEN POINT THIRTY |
| 10.33 | TEN POINT THIRTY-THREE |
+-------------+------------------------+
